Displaying 7 results of Picosulfate Impurities Picosulfate is a laxative used to relieve constipation. However, like all pharmaceutical substances, it may contain impurities that can affect its safety and efficacy. These impurities may be residual solvents, degradation products, or other substances that were not intended to be present in the final product. Therefore, it is essential to identify and control these impurities to ensure that the medication is safe and effective for patients to use.